Device for pumping out boats



Sept. 19, 1939. J. A. LARSSON DEVICE Fon PUMPING vom' Bons Filed Jan. 4, 1939 2 sheets-sheet 1 U m L,

Lf. Larsson M nel Sept 19, 1939- J. A. LARssoN l 2,173,210?

DEVICE FOR PUMPING OUT BOATS F'liled Jan. 4, 1939 2 Sheets-Sheet 2 Q A6 ,fr/5E' HVe/vw/ Larsson V yal Wm Patented Sept. 19, 1939 PATENT OFFICE DEVICE FOR PUMP-ING OUT BOATS John Arvid Larsson, Vastervik, Sweden, assigner to Oscar Algot Widegren, Stockholm, Sweden Application January 4, 1939, Serial No. 249,333 In Sweden December 30, 1937 1 Claim.

This invention relates to a device for pumping out water of boats when moored and more particularly to a pum-p of the kind that is operated automatically by tensile forces produced by the movements of the boat in relation to the water under the action of waves or wind.

The object of the invention is to provide a pump of this kind, which preferably may be connected in a cable or the like by which the boat is moored or anchored, and which is of a practical and solid construction.

With this and other objects in view, which will become apparent from the following description of a preferred form of the invention illustrated on the accompanying drawings, the invention consists in the construction, combination and organization of parts hereinafter to be described by way of examples with reference to the drawings and nally pointed out in the appendant claims.

In the drawings:

Fig. 1 is a side view of a boat and illustrates two different manners of mounting the pump.

Fig. 2 is a longitudinal section of the pump.

Fig. 3 is a cross section on a larger scale on line III- III in Fig. 2.

Fig. 4 is a cross section on a larger scale on line IV-IV in Fig. 2. t

Fig. 51s a view, partially in longitudinal section,

of a foot-valve structure for the pump.

Referring to Fig. 1, I designates a piston pump comprising a cylinder I in the form of a relatively long piece of tubing provided at one end with a cylinder head 2 and at the other end with a stopper 3. Disposed for reciprocation in the cylinder is a piston 4 secured to a piston rod 5 projecting through and guided in a central bore in the stopper 3. At its projecting end the piston rod 5 is provided with an eye 6. A coiled spring I is disposed in the cylinder between the stopper 3 and the piston 4 and tends to move the latter towards the head end of the cylinder. For limiting the movement of the piston towards the other end of the cylinder there is secured on the piston rod 5 an abutment 9, and there is provided a cushioning spring 8 around the piston rod 5 between this abutment 9 and the stopper 3.

Secured to the outer end of the cylinder head 2 is a Carbine-hook I0. In its wall the cylinder head is provided with three angularly spaced screw-threaded inlet openings II into one of which there is screwed a pipe or bent nipple I2 having connected to it a hose I3. The other two of the openings II are plugged with screw plugs 65 I4. The openings II open to an inlet chamber I5 (Cl. I3-153) from which a number of holes I 5a extend through the inner end wall of the cylinder head to the end surface I6 thereof facing the piston 4. This end surface I6 is slightly concave and forms a seat for a rubber valve disk l1 secured at its center to the cylinder head 2 at the center thereof and covering the openings of the holes I5a in the seat surface I6. Near the cylinder head 2 the cylinder I' is provided in its wall with a number of circumferentially distributed outlet openings I8 covered 10 on the outside of the cylinder wall with a rubber sleeve I9 serving as an outlet valve member for the pump. Surrounding the outlet openings I8 and the sleeve I9 is a casing 2D provided with an outlet 2I. At one end of the casing 20 there is 15 provided between the latter and the cylinder I a sealing ring 23 of rubber or the like.

To the free end of the hose I3 there is connected a foot-valve structure 24 which, as shown in detail in Fig. 5, contains a valve member in 20 the form of a ball 25 or the like and has its inlet openings covered with a wire net 26 or the like.

As shown to the left in Fig. 1 the pump I can be connected by means of the carbine-hook I0 to the stern of the boat, and a cable or the like for 25 mooring the boat can be secured in the piston rod eye 6. When the other end of this cable is secured toa mooring post or the like and the boat is oscillated by the action of waves or wind, the pump piston 4 will be alternately pulled away from` the 30 cylinder head 2 by tension arising in the cable and pushed towards the cylinder head again by the spring l, thus creating a pumping action whereby water may be pumped out of the boat, the flexible suction conduit or hose I3 being placed with the 35 foot-valve structure 24 inside the boat at the bottom thereof.

As shown to the right in Fig. 1 the pump I also can be placed in the stem of the boat, in which case the cylinder head preferably may be provided 40 with an ear or the like, instead of the carbinehook, for fastening the pump in the boat. Further in this case there is connected to the outlet 2l shown in Fig. 2 an outlet conduit 21 as shown in Fig. 1. 45

Further it is possible to operate the pump by other means than a mooring cable or the like. For instance, the pump may be operated by a Weight connected directly or indirectly to the piston rod so that the oscillations of the boat 50 cause the weight to operate the pump.

Though a preferred form of the invention has been shown on the drawings and described above in detail, I do not limit myself to this precise form since obviously many modifications can be cylinder extending between said stopper and said piston for biasing the latter towards said cylinder head, conduits provided in said cylinder head and extending from the inlet chamber thereof to the inner end surface of said cylinder head, an inlet valve disc of flexible material secured Within the cylinder to the inner end of said cylinder head and covering the outlets of said conduits, said cylinder being provided with outlet'openings in its Wall near said cylinder head, and valve means arranged outside of said cylinder for controlling said outlet openings.

JOHN ARVID LARSSON. 

